Filter.



PATENTED NOV G. M. KNEUPER FILTER.

APPLIoATIoN FILED JUNI: 1. 190s.

2 SHEETS-SHEET 1.

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B K im Il? A TTOHNEYS i PATENTED NOV. l2, 1907.

G. M. KNEUPBR.

FILTER.

APPLIQATION FILED JUNE 1. 1906.

2 SHEETS-SHEET 2.

A TTORNEYS UNrrsD STATS i OFFICE.

. Be it known that I, GEORGE M. KNEUPER, a citizen GEORGE M. KNEUPER, or

NEW YORK, N. Y., AssIGNoR oF ONE-THIRD To GEO'RGE KNEUPER 4AND ONE-THIRD 'ro 'KATEfKNEUPEa FILTER.

To alllwhm it may concern:

of ythe United States, and a-resident of the borough of A Brooklyn, county of Kings," city and State lof New `York, have invented certain new and useful Improvements in Filters, of which the following is va specification.

to combine with a filter a suitable mechanism for cleanf ing it by the pulsating, and particularly the intermittent action of a current of liquid passed there-through in ciency thereof.

the direction opposite 'to the flow of the-liquid during filtration;` a further object` of my invention isto provide convenient means for introducing in to the filter a powdered substance, such as charcoal, or calcium phosphate, and depositing said substance on the filtering material or filtering body so as to increase the effi- The Vinvention will be lfully described hereinafter and the features of novelty pointed out in the appended claims.

Reference is to be had to the accompanying drawings in which Figure l is a vertical section through a filter fittedl' with means for cleaning it'according to my invention; Fig.` 2 is a cross-section on line 2--2 of Fig. 1 drawn upon an enlarged scale; Fig. 3 is a vertical section of line 3 3 of Fig. 2, and Fig. 4 is a side elevation With parts in section on line 4-4 of Fig. 1.

A is a cylindrical shell screwed at the bottom into a bottom member B from which rises at the center the perforated pipe C which communicates with the passage B of the bottom member. The said passage is closed at one end' by a screw plug D which can be removed when it is desired to clean said passage, and at the other end is located an axially perforated screw E connected by means of a clamping nut F with one end of a valve casing G. At G this valve casing is connected with a supply pipe such as the water-main, and at G2. with a pipe H leading to the inlet H at the upper end of the shell A. At the lower end of the apparatus is located an outlet B2 controlledby a valve I` which maybe rotated by means of a crank I. p The upper end of the casing is also provided with a suitable outlet such as a common faucet J.

The upper end of the pipe C is screw-threaded and receives a nut K which is adapted to press down a top plate L arranged to clamp from above the filtering material M and a layer of wire netting N which is wrapped around said filtering material. The filtering material may be a sheet of pulp or cotton or any suitable substance. When a sheet is used it is wrapped on a perforated tube O, the ends of the sheet being bent inspsciacation of Letten- Patent. Applimi'n mea Jue 1.1906. seen No. 319.674..

ward over the ledges of said -tube so that a tight joint will be'formed.- The nut K is provided with a handle K to facili-tate its manipulation, and is also provided with a longitudinal channel K2 which communicates with the outlet of a receptacle or cup P screwed upon the upper end of the nut, and having a. cock Q controlling the communication of `said cup with the channel K. The lower end ofthe cup also serves as a clamp to press down a cap R pressing down on a. washer R located at the upper edge of the shell A. In order to space the layer N of wire netting, or other perforated material from the inner wall of the filter casingX longitudinal ribs N are provided on the outside s aid layer in engagement with the inner wall of the shell A.

The connection of the supply pipe G with either the pipe H o r the passage B in the bottom of the filter is controlled by a three-way cock S which in one position, as shown in Fig. 3, disconnects the supply pipe from the filter, while' in its second position it will connect said supply pipe with the pipe H, and in its third, position it will connect said supply pipe with the bottom passage B.

` In the normal operation of the filter, the cock Q will/ be closed, as will also the valve I. The three-way co`ck S will be turned to connect the .supply pipe G with `the bottom passage B. The water or other liquid to be ltered will. travel .upward into the pipe C, and travel through the perforations thereof and then through the pipe O to the filtering material M, after passing through which the filtered liquid will issue through the outlet J when the same is opened.

It will be obvious that the deposits due to filtration will form chiefly on the inner surface of the filtering material M. Now in order to dislodge these deposits I send a pulsating current through the filter, that is, a current varying in strength, and in the particular embodiment of my invention shown'herein the force of the current varies from a maximum to naught, although this is not absolutely necessary. To accomplish this result the faucet J will be closed and the three-Way cock S so turned as to connect the supply pipe G with the pipe H. Water will then flow through the filter in the opposite direction, and of course pure water should be used for this cleaning operation. 1f now the outlet cock I should be opened, the sediments would be partly washed out vthrough the opening, but very soon theliquid will become clear showing that the water passes through the filter withoutany cleaning action. VIf then, however, the crank 1 is revolved so as to alternately open and close the outlet, and thus produce a pulsating and specifically an intermittent current, it lwill be observed that the stream of water which hitherto was quite clear becomes turbid again,

Patented Nov; 12, i907.

thus clearly showing that the pulsating action of the current has much greater eiiiciency to clean thelter than the mere reversed ow of the liquid.

While it is obvious that the pulsating action might be obtained by different means and at different points of the path of the current, I consider it preferable and more efficient to produce the pulsation by periodically obstructing the outlet, either partly or entirely, as in this case the back pressure created by the closing or obstructing of the outlet has a beneicialaction by producing what is known as a hammer-blow, that is, a shock which tends to loosen the particles of sediment.

The cup P is used for introducing into the center space of the filter a powdered substance or other matter which assists liltration, before the liquid to be filtered is introduced. That is, after filling the cup with the said substance while the cock Q is closed, the said cock wouldbepened allowing the substance to pass into the centralpace of the Ailterand then the cock Q would be closed and the cock S opened to admit the uidto be filtered to the central space of the filter.

This fluid would naturally force the powdered sub-l stance, or other filtering medium, against the inner surface of the filtering material M and'deposit it thereon thus increasing the efficiency ofsaid material. The

substance so introduced may be, for instance, char-` mains; such fluid would then beadmitted through the opening normally closed by the plug D, the cock S remaining closed. Otherwise the operation will be the same` as above described.

I claim: l

1. A filter comprising avcasing, a perforated tubular .member therein, a ltering material surrounding said member, and a layer of perforated material wrapped around said filtering material and held by the inner wall of the casing. i

2. A filter comprising a casing, a tubular filtering material therein, and a layer of perforated material wrapped around said ltering material and held by the inner wall of the casing.

3. A filter comprising a casing, a tubular filtering mate- -rial therein, and a layer of perforated material wrapped around said filtering material and provided with external spacing projections in engagement with the inner wall of .the casing..

4. A filter comprising a casing, a tubular filtering material therein, and a layer of perforated material wrapped around said filtering material and provided with longi tudinal spacingr ribs in engagement with the inner wall of the casing.

5. A filter comprising a casing, a tubular filtering material therein, a layer of perforated material wrapped around said filtering material and projections for spacing said perforated material from the inner wall of the casing. u

6. A lter comprising a casing, a perforated pipe rising from the bottom'of the casing and screw-threaded at its upper end,A a tubular filtering material surrounding said pipe, a top plate ttedaround the pipe and arranged to engage the end of the filtering tube, a channeled clamping` nut screwing on said pipe and engaging said top plate, and a receptacle supported by `said nut and having a valved connection `with' the channel thereof.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

GEORGE M. KNEUPER. Witnesses:

JOHN LOTKA, JOHN A. KEBLENBECK. 

